Definitely buyer's market, so walk away. The palomino should be demonstrating blue ribbon show movements for $3k, and I don't see that. It might help when you're looking to find an owner who is on the tall/heavy side. I bought my 16'3hh KMH (1,400 lb) gelding specifically for my 6'5" DH, who was pushing 300 lbs., now much lighter. He's leggy, the horse is leggy, so they look good together. My 15'2hh KMHSA mare care carry him, too, so it's not just height. He just LOOKS better on his horse. (Look at MY HORSES for pictures.) Also, my 15'3hh QH isn't too light for him. You should study up on conformation and look for a horse with really good legs. You need a good bend above the hocks bc straight legs are weaker, and there are a LOT of people who breed that into horses nowadays, probably bc our horses never get used like they were 100 years ago, where this would make them break down.
Don't buy a weak back. You can see weakness right in front of the hip.
Short cannon bones are necessary for good weight carrying, too. Don't buy "downhill," either.
Happy hunting. Keep posting pictures of possibilities and we'll be happy to critique them for you. =D