OOC: So... 10,000cp = 100gp = 500lbs??
Once the sword, gems, and potion are recovered and distributed (and he'd greedily lay claim to any of the above), Grampus and company search for a mechanism to shut the secret door. "We'll cache the copper pieces here. If we fail to fill our treasure sacks with more valuable silver or gold, we'll collect this hoard on our trip home. Grab a couple handfuls of coins, boys, as souvenirs to celebrate your first big score!" He waits until all party members have crawled out of the treasure niche, then prods the red star in an attempt to close the secret door. When he fails to reach it he cries in frustration, "By Crom's sack, do I have to ask for a boost? One of you tall people with the big sticks, poke that red dot!"