Thats a much better price offer and would probably be way too much except for the Compendium. Without knowing how much you need to go in the Compendium it is impossible to estimate. That's a much more realistic offer, and should be enough to start the negotiation with someone. But before anyone can say what amount of work is needed, you need to be able to explain exactly how everything that is needed works, what attributes are needed, etc. Saying, say, 7 Skillsaves, Attacks, Dodge isn't enough - you need to be able to explain exactly which attribute each needs and what happens when the button is clicked. For the compendium, if Roll20 allows it, you also need to list everything that goes in it, and the fields needed (and anyone with the Compendium Curator tag, like Scott, would be able to estimate that way better than me). If you are making a custom sheet available for others to use, the game's rules must be available somehwere (this can be purchasable, but you most be able to show the Roll20 staff how anyone can acquire the rules). Though that level of detail can be conducted privately with anyone who is interested in taking up your offer - you don't need top talk about that on a public forum if you don't want to. You have given enough information here to get the ball rolling, I think. I would be interested, but I have no experience with the Compendium, and don't know what the roll20 Devs need to start the ball rolling there.