In bteam, theres no way to make any myms other than voting. The marketplace is pretty much useless since nobody really uses it and all the prices are wack. Since players use myms to trade with each other, for claimblocks, and for the shop, could we also get a sell option in the spawn shop? I think having some rare items that can be sold at spawn through a sign is a good way to add more options in the server economy. Most things in the market shop are being sold for just 1 mym.
In the past, we've only really had selling options on the market for vanilla servers. I think this would be a decent idea to look into, and I'll ping the @Administrator team to get some more qualified opinions on this.