if any of those engines are open rocker four strokes, then you might be able to get a pretty penny for them. i've bid many time on NIB open rockers on ebay but each time they sold for more than $200. if your engines don't have the box and tools but are new (turn over easily, no rust mint condition) i wouldn't be surprised if you get bids of over $200 for each of those engines. the airframes i doubt will be worth anything close to that much.

if they are two strokes... well they'll be worth something but nothing to write home about!