You got lucky. Six-axis was denied from this promo. Only Dualshock 3/4 should have been accepted. Six-Axis has a trade value of like $4. A friend tried to trade in one on this deal and was denied. YMMV obviously if the CSR doesn't care.
RFD: Pick any two.
1) In stock
2) Low Price
3) Quality Product
1) In stock
2) Low Price
3) Quality Product