Best thing to do is to direct the customer to the correct piece of gear the first time.

I sold keyboards and piano from 1997 to 2009. I had around $400,000 in sales per year. My returns were low because I tried to direct the customer into the right gear the first time. One year, I sold 65 Yamaha Motif ES keyboards. I loved my job but I saw a major change in the industry over my 11 plus years. Plus, the profit margins really started to dip below the 20% mark. Hard to keep the doors open with a tighter profit line!

You do a great job! Sell you and sell the right gear!!