Maybe the lenght of this "text", the first character, the last character and potentially some description of the character set might be usefull (for example, only capital letters, alphanumeric,...).
Don't post the rest of the "text" tough, don't give it using a PM either... In case your seller used a weak encryption scheme, sharing the "text" might lead to loss of funds...

I'm not sure if anybody will be able to help you, but the description "some text" defenatly isn't enough...