So I walked into my lfs and was browsing as I usually do and looked in his 75g tank of oddballs people bring him and saw this 5-6" Clown I didn't get an exact measurement because I had to rush him home because his spine slashed through 2 bags and he was leaking water fast haha, he was not a happy camper. Only paid 25 bucks for him too. Was a good day .
A Kansas City LFS had the similar-sized clowns for $30, so you did pretty good. If you're interested in adding on a few swim partners for your new clown, try Petsmart. They have them on sale for under $5 each. My local Petsmart has 3 inch clowns. They're not as big as your's.