I am low on belts for my Porter-Cable belt sander - 4"x36". The local woodworking shop had that size belts but wanted $6.99 each. They had boxes of (10) 4x24" for $20.
On-line, Peachtree Woodworking sells 4x36" at (5) for $10 ($2 ea).
Why such a big difference? Any thoughts?