Pretty frustrating, had that happen more than once, what I hate is contractors asking for more money after the work is done, same thing in my book. I was at a gun show once and paid what a sticker said for an sks about 10 mins later a guy came up to me and said my buddy said you ripped me off that it’s worth way more so I’m going to have to ask for more money. Had to say sorry I paid your price your loose is my gain. There is something to be said for cash on hand and making the deal before people can change their mind