Hey /x/ might be a bit off topic but im going to a estate sale over the weekend and was wondering on suggestions on some related stuff to look for also general relative story dump.
I think you're confusing real estate (a parcel of land) with legal estate (the will of the deceased). This is a sale of some dead person's stuff. It may or may not include the house. What if they were renting?
If you mean potentially haunted items, they'd be the most personal ones. The bed, any jewelry, framed mirrors. Those are going to be expensive or bulky or both. Best bet is to make a guess on the favorite chair. Typically they donate the clothing, otherwise that's a good prospect.
If you didn't know the deceased, it's a shot in the dark. There's no reason to suspect some random person is going to rest uneasy in the grave, just because he's dead.
So my advice is to bid on stuff you need. Estate sales are good for getting quality stuff with a lot of use left in it. If you could use furniture, bid on that (don't buy a chair you haven't sat in, be aware that old beds may not be standard mattress sizes). Kitchen stuff normally goes at very reasonable prices. Take a tape measure, don't exceed your budget, and don't expect to win everything you kind of want (you have to pick your battles).
Depending on the kind of estate sale, you can find a lot of relatively mundane items with occult uses. If it's the kind where the house is left more or less as is, and you're free to go in and buy whatever, you can often buy a big ol' box of candles for maybe a few bucks tops. Same with trinkets that might have use in some kind of altar. Old people love that shit, apparently.
I know I've found pretty groovy troves of paranormal books from the 70s, including some on meditation and astral projection, mixed in with a bunch of pulpy paperbacks.
I've also found half a set of zodiac mugs, black with gold foil, classy as hell.
Overall it depends on what you're looking for, OP. What are you into?