Welcome to Epic. I'm not sure what it is you found on eBay, boots or skis? Buying skis on eBay is one thing, boots not a good idea, unless the boots are new and never used and you know that specific boot fits your feet. Buying used boots on eBay is very risky, although I know the people who can't live without their rear entry boots swear by eBay. Go to a local ski shop and see what boots they have left from last year or even the year before. But, before you do that, go to the "Ask the Boot Guys" forum and read the wikis about fitting and terminology. Hopefully that way you can avoid getting boots that are too long and too wide. As for the bindings, as long as those bindings are indemnified you can use current boots with them. If they aren't, the boots may or may not fit properly but you won't be able to find a shop that will adjust them due to liability reasons. IIRC those are the same bindings I have on my old Volkl P30 Racecarvers and they are not indemnified, but I could be wrong.