Have a pricing question for a few items

[WhoKnowsWho]

I have a Schumacher RS 4x4 Road & Track new in box. I haven't seen this or the Pro Cat on ebay new in box so I have no idea how much it is worth.

I also have a Kyosho Lamborghini Diablo Scale series vehicle to sell. Seems one on ebay is repeatedly posted for over $400, but never sells.

Has anyone seen these sell recently so I know how much to expect?

I'm also trying to sell a Kyosho Lazer ZX but I've seen a few of these sell NIB so I think I have a price idea correct for it.

Thanks a lot.