Hello Denis:
Peterborough, ON, area here. Noticed you are from Wasaga Beach; not all that far away. You have two Spyder dealers nearby you, one in Midland, another in Barrie. They may be of some help; don't know anything about them personally, so can't advise there. Two very good Spyder outlets near me; one just outside Lindsay, the other in Uxbridge. Both highly reputable. Take a look on Kijiji, Ontario; you will find a fair number of used Spyders for sale all over Southern Ontario.
Most of the guys above are pointing you towards a good used RT, maybe something from 2014 onward with the 1330 engine. You'll have to make that choice (over the 998 twin engine). A newer bike will likely have less mileage and probably also some warranty left. You'll have to check anything out mechanically, and compare features as between models and add-ons. I ride a new 2017 F3 Ltd., and we do mostly two-up riding. It's turning out to be a great little machine for our shorter day tripping and occasional weekend overnight. There's a difference in ergonomics between the F3 and the RT. The newest 2017 F3L comes closest to duplicating some of the two-up touring features of the RT's. That is not so true of the earlier, more basic or sporty F3's. So, since you don't want to go new, I would agree with the others that you're probably better off simply looking for a 2 or 3 year old RT. But, you could always do a test ride just to see what the 'difference' feels like.
Let's just suppose you opt for a used RT. I did a quick look through Kijiji at available used bikes within a few hours' drive. There are a number of RT L's and S's listed. There are several 2014's with a year or two of warranty left, and anywhere between 20,000 km and 60,000 km on the clock. Asking prices for those are anywhere from $20,000 CAN to $25000 CAN. There is a listing in Dunnville for a pretty nice looking machine asking $20K, and negotiable. Slightly older bikes with the 998 twin seem to be asking anywhere from $14/$15K up to $19K. Been a while since I was really checking these out, but that will give you some flavour of the current market 'ask', at least up around S. ON.
Good luck in your search; maybe we'll see you on the road. We have friends in Collingwood, and made our first real road trip over to see them a month ago. Passed very close by Wasaga. Used to camp there years ago. Cheers.