Vintage toy cars sell but the condition is VERY important. To get a good price they need to be in perfect condition just like new and with the original box.
You need to weigh the items you sell accurately and remember to include the cost of packaging to get a realistic cost for postage and packing. I sell a lot of stuff on ebay mainly vintage photographic items , you really need to know about what you are selling to avoid buying unsaleable items , to know what will get a good price and be able to give a good description . A really good photo is VITAL it is by far the most important thing in the listing, poor photo = no sale as simple as that .
Lastly sell worldwide, never just UK only, 80 % of my items go overseas mainly USA Australia and the Far East ( just sold a clock I got for nothing to Korea for £26 ) .