Maybe it’s the mare picking the fights with the daughter because she’s uncomfortable? Just because an average owner doesn’t detect a limp doesn’t mean they aren’t effecting the horse…especially if somebody is selling because of erratic behavior issues which are rooted in pain more often then not. Always uncomfortable with horses being sold because " the rider doesn’t get along with them" so they’ve been sitting.
Theoretically, bone chip removal is NBD but in the real world its far more complicated and more then just the relatively simple procedure . Don’t think seller is being dishonest but think she lacks understanding and knowledge of a procedure that often finds unexpected conditions within joint and may not allow the horse to perform at the expected level. Or maybe seller is " puffing" the sale by not mentioning things or dwelling upon the fact DD cannot ride it and they haven’t done anything for 3.5 years? Not lying but 3.5 a long time to pay the freight on an a horse bought to use that just stands around.
What bothers me here is seller is insisting you need them taken out after you buy the mare. Say what? You might want to price that out with vet/surgeon and include the months of board and other costs while the horse is unuseable then add that to the purchase price for this horse. Many, if not most, who have had the surgery have had MM insurance, you don’t. Best get an estimate of all costs involved with the surgery BEFORE taking it on. If you can afford what this surgery, after care and rehab are going to cost at a minimum (assuming no complications) on top of the purchase price on a horse that has not been in steady work? Maybe put that amount towards another horse. Like buying a $2500 car knowing it needs 2k in repairs to drive, just buy a car for 4500 you can drive. Save up longer if you have to, unlike the car, the horse is not a necessity you need to risk getting financially over your head to get running.
Think it might be different if the horse was an experienced packer with a confirmed record who had been in steady work for that 3.5 years they’d had her. She may be unsuitable anyway but the chips really increase that risk to an unacceptable level, Pick a different project.
But if you insist on proceeding, please get back to us with what the films seller says they “have to find” showed and what your vet says.
Have a thought in the back of my mind the films are in the same place as all the papers, show records, FEI passports, vaccination records and Coggins certificates that many have posted on COTH a seller promised they would find and send that never showed up.