Make a list of what you want. Let's say, you want a silver bay mare with a star, has to be AMHA registered and halter broke. Then, look at all the silver bay mares, weeding out ones that don't fit your criteria. Make a list. Write the sellers, ask questions, get pix. Take your time! Buy the best horse you can afford. Don't go for the first one you see (unless, of course, you feel that "jolt" when you look at him/her- been there, done that and DON'T regret it!!) Have someone ELSE look at the pix- they may notice something you didn't. We love to do that here on the Forum....
just remember to PM pix and not post them here, as that isn't permitted.
Then, once you get your list, ask yourself if you can live with their faults: OK, this one is pretty but hard to catch, that one is a pocket pony but not as pretty, etc.
Plus, if you wait and save your $$ you can buy a better horse and will have much more to choose from! And many people "clean house" in the spring: babies coming, new show horse on the way, so she's gotta go....