If you’ve put a “want” you do get a notification, but whether they buy it or not that depends on the price. You can go through sales histories if you’re a member to get an idea of what people are paying. If you delete and relist your items it’ll renotify everyone, but most members find this very annoying.
Condition is really important, if the records have any light scuffs or are visibly dirty then they’ll be VG or VG+ at best.
Shipping charges are another factor, I’d try and keep them as low as possible. If someone’s charging you a fiver on top of the tenner the record cost it does start to sting a bit.