Thundercat prices

Hi all, hoping to return to biking after 8 years off.

Thundercat seems to fit the bill and tested one years ago but didnt work out.

I know this is a, how long is a piece of string but appreciate advice what's considered a reasonable price?

Obviously, age ,mileage condition etc is a massive factor.

I have a specfic one in mind, on eBay ending tomorrow, "Yamaha Thundercat 600" blue and white in Scotland.
(not sure if links are allowed)

Thanks in advance for any replies

Hi I purchased my bike for £2000 pound its very clean and to be honest I am happy I did I love it and I am happy I spent that little extra.