New system parts vs. older systems

I too have bought the OLD system just few months ago, SimpliSafe wanted to get rid of their old systems and didn't let us know until we bought it, SS should had given us a choice of whether we wanted to buy the new system or the old system, instead SS just let us fallen into a trap, now their old system is worth pennies compared to the new system which we bought at FULL price. Unfair practice!!!

OK, I bought the old system at the end of November, beginning of December and they came out with the new system right after that.  Yes, unfair, blah, blah, blah.  It is what it is.
Now, I have several places where I want to add a water sensor.  The design of the new sensor looks so much better and easier to work with for where I want to put them.  I see many of the old systems on Ebay.
My question for people that have had this for a while (and maybe some that have water sensors) is,  is it worth it to sell the current system on ebay and get a new system or are the old style water sensors OK/easy to use set up?  
Right now I have the keypad, base, three door sensors and a motion sensor but I'm only using two door sensors.  I haven't put up the third sensor or the motion sensor yet.

@merpmerp, I owned the SS2 for almost 5 years and purchased SS3 the day it was announced at CES.  In my instance, most of the equipment was out of warranty, I wanted IoT connectivity and a lighted keypad.  That aside, my SS2 continued to work fine and served me well.  Financially, by planning and saving (others may say lucky) I was able to afford it.  I do not know your particular situation, of course, and you will have to decide if buying the new system makes sense for you.  I will tell you the new system performs very well and fills in gaps of the old system. (one is range for the base to sensors). One area of two stories are the motion sensors:  much more stable and work well in conditions SS2 didn't (cold, drafty areas) but in my personal experience SS3 motions are not as good with pets. Also, the water sensors for SS2 worked fine, in performance and installation. SS3 does give you more options too, like the temp sensor.

Hope this helps.

the new system has the potential to be better than the old, but it is having teething difficulties.  Since SS is offering no incentive to put up with these quirks, I'd say wait until things settle down or at least they offer a reasonable discount.

Thank you for the replies and information.  I'm only using part of what I guess they call the "Essential" that costs $259 so it's not really an issue, especially if I sell the old one on Ebay.  However, my two main concerns, the motion detector working better in SS2 and the water sensors working fine make me think I should just stick with what I have.  The only issue I really have is the lighted keypad, but I've been dealing with it so far (just have to turn a light on when I come in), so I'll stick with that for now.

Several people have mounted an inexpensive, motion activated mini light above the keypad.

Any word if Google Home or Wink will be supported? I don't care for Alexa.

Simplisafe has officially taught me the lesson of "you get what you pay for". I've been with them for over 4 years with a V2 system. I found out about the vulnerability last year and was pleased to see Melina Engel tell Forbes that a new system was in the works and a discount would be made available to current customers. I felt that they cared about me....wrong!

Here's a tip, plunk down a few more bucks per month and go with Frontpoint. If you dig into their customer service ratings you'll see they stand behind their existing customers. I'm willing to pay a little more for that!

I just spoke to someone at SS (for another issue), and did ask about the encryption vulnerability, and asked about existing customers getting a discount on the new system., and was told "management is listening" to all of the requests and there WILL be discount to us coming soon... mid-late this year. Let's hope they keep that promise and show that they value our business.

@denisesmith,  your post clearly illustrates the problems with Simplisafe and their complete lack of a comprehensive customer communication policy.  They still think its 2006 and they get the benefit of the doubt as a small startup on the great wide web.  Sorry but that shipped sailed with a 50 some odd million investment by Sequoia Venture Capital.  Bravo to the development  team for SS3 hardware and software but the inept associates in marcom  should either be docked their pay for a year or terminated.

There is a post from Melina on a proposed discount.  Considering that the entire system has to be replaced, It is pathetic.

SS is finally considering an upgrade offer and is seeking customer feedback. Please go ASAP to https://simplisafe.com/forum/customer-support-forum/testimonials-reviews-and-suggestions/upgrade-offer-need-your- and make your voices heard.

As a quick preview, SS is considering requiring us to post a video to social media about our upgrade experience in order to get the full discount, an idea I'm none to pleased about. Again, go to link above and make your thoughts and opinions known.

Too late, and too many repetitions

@afrisina8356, regular price, component by component, is the same. You may have received a discount of some type on your original system.  Also suggest you edit your post and remove your email.

I bought some add on entry sensors and glass breaking sensor but was never told their was an old and new system difference. These new sensors do not work with my older system. Shouldn't SS be at the very least telling customers about this and checking customer accounts to advise them BEFORE buying additional pieces?