Magnum heads worth the effort?

Did the heads already have valves and Springs and you just changed the springs? Was the 300 including shipping or any transportation? And how much were the springs and shipping? I'm not even going to get into how much time you put into massage of them LOL and the drill bits and sandpaper and lalala that you had to spend money on and had to have the drills and all that stuff...
300 fully loaded, ready to bolt on, and I met the member to pick them up. I chose to change to the Hughes spring kit (springs, retainers made for clearance, and keepers). Didn't put a hole lot of time into these, but it was my pleasure. I'd say I'm 600 into them with new seat.