Well a nice 300 will easily fetch upwards of 2000, here, some go as high as 3000. The same for the old 350's.
I was at an equipment auction a couple of years ago and one company had 8 old 350's in it. A friend of mine bought the cheapest one for 2200 and considered it a good deal.
I was at an auction at the university a few years back and there was a 350 there, seat was bad, but the rest of the cosmetics were nice. It had not been run in years so the battery was shot too. I watched people keep kicking it over and everyone of them mentioned no compression, they didn't realize the compression was hooked to the kick start and it didn't release until right at the end.
I took a chance and give 800 for it and cleaned the rats nest out of the air box, new battery and she run perfect. The gas cap was also bad, and you can't buy a new one anywhere, so I was watching ebay and every other place I could imagine for a week or so, when a guy listed one that didn't run on craigslist for 200.
I jumped on it and when I got there it had a new looking seat to boot, plastics were trashed, so all in all I got mine cheap for this area.
Macerena man, I have spent quite a bit of time in western Cnada, Ontario,BC and the Yukon, and found the folks great too.