Used Snowboards For Sale How To Price Items At Yard Sale...?

How to price items at yard sale...? - used snowboards for sale

I have one or two things that are rarely used .... expensive
I know people want a bargain at flea markets, then how should I price these items?

SONY-Retail $ 250.00
55 gallons fish retail $ 200.00
Nintendo 64 memory card, 2 controllers and 21 games?
New for 2007 Games
Burton Snowboard (board only) Retail $ 250.00?

HELP ME prices of those stuck in!