Only problem with that one i looked at is i don't know which backstrap it has on it. those extensions are made for the different straps. and it only comes with the one on it.
I looked there, this apparently is an older model, these is the one it had on it and it is out of stock
https://store.springfield-armory.com/xd-s-7-round-extended-magazine-45-acp/
I just fondled a XDs 45 auto at the gun shop. was used. looked new. would have bought it but only had one mag and no box. didn't care about the box. but store owner couldn't find mags for it so i left it. was a beautiful gun, had a SS slide
No matter what gun you try to sell to a gun shop, they will hurt yer feelings It's not just Glock. shoot, don't worry about what Glock did. just shoot the dern thing. no sense in losing money on it cause of what happened. but if you must insist on getting rid of it i will give you 100 bucks for...