Anyone know the cost of a new bracelet for 2531.80 ?

I'm trying to find out if it's worth trying to fix the bracelet for my seamaster 300m 2531.80 or if I should try and have it replaced? It has some slack in the links, I've replaced the pins and sleeves and it hasn't helped. Also the clasp can be opened by just pulling on it since one of the buttons seems non functional. I've found used ones on ebay for around $600. Any idea what a new one costs from an AD or boutique? Thanks in advance.