Danny,
You have hit the SWEET spot.
There are a lot more collectors of $1.00 to $5.00 items than there are collectors of $20.00 to $50.00 items.
The choice is, if you want to go for volume of items to pay for your time, or quality and types of work people are looking for to buy.
It is a very tough decision to make and we all must decide which way to go.
It is nice to have a mixture of both, and craft shows are a better judge of that flea markets are.
Rog