I'd recommend looking for a nice original VF-XF coin, raw or slabbed. These coins do not tone very often, and vivid color toning is usually (but not always) the result of toning over an old cleaning.
If you want to buy one raw, look at some problem-free coins in PCGS/NGC slabs so that you can learn their appearance and how to spot them.
- EAC - TNA - SSDC
Specializing in 1932-1964 Washington quarters
"Most of the things worth doing in the world had been declared impossible before they were done." -- Louis D. Brandeis