I use to do them from around $7 each (flat rate,min 10). I wouldn't do anymore that 30 after i did a job for 120...The assembly is ridiculous .Most online stubby companies won't do anthing under 30-50 so i'd mark them up and target that area? If you don't have the equipment you just can't compete. You should really work out your hourly shop rate to see if you can justify doing them (no use spending 3 hrs assembling stubbies if your shop rate is double that)..Don't mean to discourage you,that just my own experiance 