If possible, touch and hold before you buy, as ergonomics, display readability, etc. are important in an HT. Beware of poor battery life w/ alkaline cells at high power, but conversely, note that NiMH's have high self discharge rates in storage.
All HT's will be either SMA or BNC connectors for antenna, if needed, either can be adapted to the other or either adapted to a female UHF via a short (1-3') small coax cable adaptor, but if a remote antenna is to be used as primary antenna, a mobile rig is a better choice. speaker/mic connectors vary, but after market accessories are readily available for all brands/models.
I'm not convinced there's a lot of money to be saved buying HT's used (mobile rigs, at least single band/2m, maybe; HF rigs, sure) but keep an eye out anyway.
Wow! Now that's what I'm talking about....excellent suggestions, amigo. Thanks for the help.
Anyone else have any opinions? I'm looking for y'alls experience with HT's.