Here is an item that you can find relatively easily at thrift stores and garage sales. Vintage aluminum cake carriers. These sell for around $25 on eBay and Etsy. These will come in brand names including Regal, Kromex, West Bend, and Mirro. The West Bend made a variation in pink, that actually looks like copper. Most come with a heavy glass plate. Of course, the better the condition, the higher the price you will receive. Here are a few completed listings:
1930 Vintage Cake Carrier
Vintage Regal Cake Carrier
For more ideas on vintage items to sell, click here for a free list of items that have sold on eBay. To find out what your items are worth, check out Terapeak for research. You can learn the value of your item and the best way to get top dollar for it on eBay.