I have 140 candy hearts. What should I charge per heart, and would any of you be interested, either in that or trades? Please ping your responses.
It depends on what the heart is but some of them already have prices via user shop
Looking for these : x100
CURRENCY CONVERSION/PRICING GUIDE The stickied thread says 8-10k per heart is the usual. The current low price near the end of Survival in user shops is 13k, so that makes sense.
I take it that the price doesn’t depend on what the heart is, based on your question. You’re asking about their worth as special currency, not as items.

Oh! I'm not selling the hearts, just buying from the shop directly for those who are low on hearts themselves and feel it'd be a better deal to buy bulk than usershop.