Yes Quail Eggs are more expensive than chicken eggs.
Quail Eggs cost around $5.00 per dozen but sometimes you can find Quail Eggs for only $3.00 per dozen but if you're gonna buy really fresh Quail Eggs from a farm you'll likely pay at least $5.00 per dozen.
Quail Eggs are pretty good though and I sometimes buy them from a local farm here and pay $5.00 per dozen and they're worth it but I cannot buy them all the time because I cannot afford it.
If I could afford Quail Eggs all the time I would buy only Quail Eggs because I find they taste better than chicken eggs.