Heres a quick little addon i wipped up in about 5 mins, basicly you can type "!spawn" in chat and you will buy a respawn if your dead or alive, MAKE SURE your using the new eventscripts OB engine or else the you spawn on other people and people can kill you liek 50 times in 1 hit.
On round start it will say: (YOUR NAME) Has Brought A Respawn!!
And if you dont have enough money it will say: You don't have enough money!
The next update i do will have it so alive players cant respawn, so if there on like 20hp they can respawn but it dont matter.
Extract Contents To The Root Folder IE: cstrike folder.