Just looked at creating a thread, looks very good! Having the tags selectable is very nice, but it would be better if you could remove the (No Prefix) option, if possible. Other than that, let's hope this works out!
For now, yes. Services introduce a whole new level of headache for dealing with fraud, bad sellers/buyers, miscommunication, etc. We realize there is demand for it but we'll wait and see how things work for now before delving into any kind of services marketplace.
Though it was clarified that if you're selling a product and are offering to mod it for the buyer, that would be allowed as you're still selling a physical thing. What is not allowed is selling a service where someone has to send a good to you for you to modify.