Are there any helpful accountants out there ?

I am hoping to persuade a large company to buy my home.
If they buy it for £100, how would this show in their accounts ? If they then sold it for £90, how would it show ?
Does there corp tax reduce by any amount ?

I'm ignorant in accounting.

Don't ask why they would sell for less than they buy, but there are other considerations in the mix.

Tx for your help