2 x 1/2 charged CLW wands get my vote. That's 750 gp each, right?
We should have some change. Let me suggest the following incidentals. I'm listing them as bundles, so other players can vote straight up or down:
2 Flasks of Acid (10 gp, 1 lb ea)
2 Flasks Alchemists' Fire (20 gp, 1 lb ea) to deal with swarms. (I'm not advocating for Holy water because it's only marginally more effective than acid and costs much more)
Total for this set: 60 gp
Crowbar (2 gp, 5 lb)
Hammer (0.5 gp, 2 lb)
3 iron spikes (0.15 gp, 3 lb)
Upgrade one party member's pack to Masterwork (add 48 gp, 2 lbs) to handle added weight.
Total: 50.65 gp, 13 lbs -- Add rope to this list, if we're not already well-supplied for that.
If we have funds left over, I favor buying multiple MW backpacks, and some spare sacks, might also be a good idea for avoiding encumbrance penalties on the return trip.
Not trying to go too 10' pole here, but these are relatively cheap items that can become really useful if you need them.
We could also purchase some 1st level arcane or divine scrolls, but I don't see any gaps we urgently need to fill there. Thoughts?