I like building and scripting new things in Second Life. The money I collect from sales I use to create new objects and to pay the monthly costs of my little land. ;)

The prim/mesh items are sold with copy/modify permissions (the scripts in the contents has usually only copy permission). Textures for creators have full permissions, BUT YOU CANNOT resell or give away my resources (or any parts of it) as a competing resource material whether they are changed or not! You may build your creations from them and sell those items.