OK then first 2 responses and no actual answer. C'mon people, help me out here!
Cheese tray for 2 people. The question was what would YOU put on the cheese tray YOU serve. After that it was what would you pay? So, if you're paying, what would you expect and what would you pay for that?.
I would use local cheese which would be 1/3 of a small round of brie, and some of our famous cheddar, about 3 or 4 ounces and a soft cheese such as Boursin (you could cut it in half). Add some water crackers and maybe some Cabaret crackers. A small bunch of grapes and a few strawberries also. I wouldn't hesitate to charge $25-$30 depending on it's size.
I would estimate approx $10 for items which should get a mark up of at least 100%
(I know it doesn't seem like you could do it for $10, but if you have a Costco or similar, you buy the items in bigger quantity and store them)
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