We sometimes buy a little cantaloupe at the store. In the produce section they usually have plastic containers of pre cut cantaloupe. I assume that its basically a huge markup to buy the pre cut melon like that versus just buying a whole melon then cutting it up yourself.
I bought a whole cantaloupe for $1.49 /lb. The cantaloupe in question was 2.49 lb and cost $3.71. I cut up the cantaloupe and ended up with just about 16 oz. of fruit. Only about 40% of the melon was eatable fruit after getting rid of the rind and the seeds. If I was more careful with my cutting I probably could have gotten more eatable melon but I got 40%.
So I paid about $3.71 per pound of eatable melon.
Cut melon in a container at that store cost $2.99 for an 8 oz. portion. Thats $5.98 per pound precut.
If you cut the melon yourself you save $2.26 per pound. I don't know how long it too me to cut up the melon, but I'd guess it was around 5-10 minutes. That works out to $13-27 /hr of time.
I'd say its certainly worth it to spend the extra time to chop up a melon. Plus the freshly cut melon is better tasting as well.