Is there some resourses where I can sell pc time for mining?
A PC's general purpose CPU is so far outclassed by specialized mining chips (ASIC's) that its value for mining is almost null. Perhaps the only instance where a PC could be useful for mining is at the very beginning of a crypto-currencies life cycle, when has just been launched, and very few are mining it. But when ASIC mining hardware joins the coin's network, difficulty will rise and render CPU miners inconsequential.
If you expand the definition of PC to include ASIC mining hardware, then the idea of selling hash power is interesting though. I found the following reference to this idea: https://en.bitcoin.it/wiki/Hash_Market