How do I find the place to buy the deed.

Check with your county's Register of Deeds website or office.

@Mor Vang I am assuming you are referring to a tax deed. You buy them from auctions held by the county. Sometimes if no one bids you can buy them directly from the county at face value (the amount of the taxes owed)

However you can not just buy any deed. It has to be a property so far in tax default the the county has taken it for lack of paying taxes. Not all areas sell tax deeds. Some states sell Tax liens. Which means you are not the owner of the property unless you foreclose on the property.

@Mor Vang     The seller should have the deed.....but when you buy, the title company would draw up a new one for you.  This is not 100% necessary, but normal for most buyers and sellers.  They then record the deed with the courthouse or county clerk.

@Mor Vang

You referring to tax deeds, contract for deeds or notes ??

Buying a “deed” is buying a property and it’s deeded to you.

Buy the deed means what?  As noted, to get a tax deed (at least in OR), they've skipped on taxes for 3 years.  Then you get to foreclose on them which is time/lawyers.