There are many considerations aside from the cost of the table itself.
It is going to have to be disassembled, moved, and reassembled. I assume that it is a 3-piece slate, and having it installed and properly leveled is best done by a table mechanic. Each piece will probably weigh 150#.
Since you are going to have it apart, it is a good time to change cloth. If the cushions are old, they may need replacing, too. Again, this is a job best done by a table mechanic.
Depending where you live, the break down, move, and reassembly will likely be a few hundred bucks. If you do it yourself, you will understand why they charge this much. New cloth, another couple hundred, cushions another couple hundred. The only way to find out how much a pro would charge, would be to call one in your area.
Regarding price, old pool tables tend to be cheap. Brunswick Gold Crowns can be had for $1500, so unless it is a really good table, $1000 is probably on the high side.
Throwing in the accessories, doesn't count for much of anything in my book, as they have little resale value on their own.