Spending $12 a year for the domain like RealDeals.com can help you control the brand as well as having a support site and pro email addresses.
If you find an available .com name, there's a high probability that it' not a trademarked name.
Bitsa Merchant.( bitsa this and bitsa that )
I sell allot of different products on eBay. Electronics, Vintage cameras, Shoes, etc. Whatever sells on eBay i sell. I want to make a good business name. What kinda name should i use that will fit good with the stuff that i sell.