Sale

N weapons

 * +0 weapons give 1 each.
 * +1 weapons give 4 each.
 * +2 weapons give 20 each.
 * +3 weapons give 100 each.

R weapons

 * +0 weapons give 2 each.
 * +1 weapons give 8 each.
 * +2 weapons give 40 each.
 * +3 weapons give 200 each.

SR weapons

 * +0 weapons give 5 each.
 * +1 weapons give 20 each.
 * +2 weapons give 100 each.
 * +3 weapons give 500 each.

SSR weapons

 * +0 weapons give 10 each.
 * +1 weapons give 40 each.
 * +2 weapons give 200 each.
 * +3 weapons give 1000 each.