The hold up with Ramirez was connected to who owned him and who would pay the South American club. The agent in his case expedited the situation...accepting reduced payment to get the deal through. Many agents do try their best for their clients as everyone benefits if they get a good deal and a decent move. Unfortunately young footballers (especially in South America and Africa) can get involved with shysters....though even the worst usually get their clients a job. If you come from a poor country and an agent gets you a job at a club like Celtic, you will be grateful.
I think this is dead. The agent said they informed SFC the wages were unacceptable a few weeks ago. They've apparently not had an improved offer and are looking elsewhere. My guess is that is what Nicola is doing as well.
Ramirez's agent did do all he could to get the transfer through, eventually. And he only did it because they had no other options. Wanyama's agents currently have no other options either, we're the only club who has had a bid accepted. Unless that changes, they will end up desperate to push this deal through as well.
I'm not saying he will definitely sign for us, I don't know, but all of this agent talk is part of the negotiating game, and should not be taken at face value.