Do you accept cashiers checks ?
No, there are a lot of counterfieters out there. Only U.S Posta money orders are accepted. There are counterfiet Postal money orders out there also, but I am 40 vet at the U.S. Postal Service, I can feel the paper and know if it is genuine.
Do you accept well concealed cash ?
Yes, at your risk. To be safe I recommend sending it Certified mail, with a return receipt. This will give you a tracking number and absolute proof I received it when you get back the return receipt with my signature. That will cost you $5.69.