Well at the moment there is not a head shop on the SMP Server...
So my idea will be perfect in fixing that and you wouldnt have to build and design a specific spot on spawn for it..
As seen on the HermitCraft Lets plays they have a thing implemented that is called More Mob Heads
that adds a custom loot table for all the mobs...
Every mob gets a custom % for its head to drop..
Which would add to the SMP VentureKraft Economy... You could change the % of the mob heads drops so that they become more rare which would increase the value of the Mob heads!
I my opinion it would also go in favor for the people who like to collect rare stuff on the VentureKraft Server and thus add more fun activities and playtime on the VentureKraft Server...
The post about how to add the More Mob Heads extension is on this page
I hope you like my Idea!
Stay awesome...Till next time!