Love it or hate it, Fleabay is a decent reference for fair market value, so I put in "IBM T22", some are assessories, but 672 current auctions, and 2674 completed. Sorted by price high to low its around page 6 with shipped prices from $350 to $300 that the bidding gets heavy, and language like "for parts" starts showing up along with bare or partial systems. Really nice complete systems were more like $450 to $400. My view, Woot warm. I would try to find somebody local that doesn't want to fuss with auctions and offer them $300.
Keep in mind though over the next 30 days old laptops are going to get bought up like crazy for school. My son is getting our old IBM 770 with no battery.