Sorry the answer was so slow; I just realized you'd left me a question tonight. After some research, the best I can tell you is, while there's no set collector's value I could find, I did find the original full-sized chrome silver Buzz Lightyear listed for sale on ioffer.com for $110.00.
Bear in mind, they can ASK any price they want, but that doesn't mean they'll get it. Though, I've paid near that for some of mine, so if someone wants him bad enough, it's not impossible he'll go for that price.
Sorry I couldn't find a more definitive answer for you.