Yes, both a trustworthy. I'm an eBay since 9 years, now with 1389 feedbacks. eBay is safe and correct, if there are problems, they mostly depend on the eBayers, not on eBay itself.
Me and my wife have bought all kind of stuff there, even furniture. This was the biggest, resp. heaviest item:
During all the years at eBay I only had very few problems. One or two times, where the seller hadn't reacted (but I haven paid, so I didn't lost money). And only a very few buyers, which haven't paid.
I've sold any stuff at eBay, which you can think about. From single bottle-caps (I'm collecting them a little bit) and an used plastic bag (a little spare-part-bag from the truck-company "Büssing" from the 60ies) up to furniture, motorbikes (my wife's Suzuki GS 500 E) and cars (my Dad's 1990 VW Passat Variant, my Mother-in-laws 1995 Ford Escort Turnier and a wreck of a 1937 DKW F7.
My both grandmothers died in 2005, then I was busy for months to put hundreds of theirs household-stuff, furniture, books etc to eBay. Without any problems.
I agree with G-Mann:
@sandwad: at first take a look to the feedbacks of the seller and the other stuff, he is offering. When he's at eBay for many years and has some hundreds of positive feedbacks, it will be okay. And as boogieman says, check the shipping prices. Some guys trying to cheat with them to make money.
Yes, for collectibles as old toy-cars, eBay is indeed the best choice. Much easier than too look on flea- or collectors-markets.
And don't be afraid about International auctions. I was always lucky with them and since there is PayPal it's much easier and safer.
I've delivered my stuff all around the world (in Alaska sits a big collector or air- and seasickness-bags. He liked the 1987 bag from the Danish Railway-Company, I've sent to him
).
And I'm buying stuff from all around the world, mainly stuff for my VW K 70-collection. Where else I should get them?
P.S. Moai, the Easter Island-head, seen above, was bought in Britain.
Oh, not to forget, that eBay is a good possibility to make interesting contacts! Mainly due eBay, I got contacts to several German license-plate-collectors, the freaks, which are strolling around here:
http://www.pl8s.biz/index.php
And I use eBay as a lure - a lure to find other, unknown K 70-freaks. Very easy, when I see. that someone is out there, who is buying spare parts or collectibles of that car, I'll push some of mine stuff in the auctions to try to catch him.