batlabs.com
Batlabs.com is a great place to lookup motorola model numbers. However, be advised that model numbers do not always tell the whole story. For example, on alot of UHF gear, you have to read the radio with a computer and software to determine the exact UHF bandsplit (for example, to avoid getting stuck with a used Fed. Govt radio that covers 400-430mhz). I think the same caveat also applies to other frequency ranges.
So, let the buyer be ware, and get clarification from the seller.