Wow, 3 MHP leads inside 30 minutes. Help with contract!

[Jonathan Napper]

I connected with an owner who has 3 MHP he is selling in Kentucky, they are not listed. 

One consist of 10 spaces $30k

Another consist of 12 spaces and some adjacent storage units (17) $140K

Another consist of 30 units $480K

I am curious how much would you offer to put said MHP under contracts? Is there a rule of thumb, like X asking equals X offer on contract, until I can unload them?

Thanks

Jonathan