He's offering to transfer ownership of it for $500, but I can get a more generic domain for $20.

For instance, Closing fee will be around $1,200Lender's Title will be around $1,000 (or less)Recording fees will be around $140 - Cant say if you will have to pay transfer tax to the City because you have not indicated which suburb the property is in. 

Can I simply transfer my IRAs into my Solo 401K?

Copies of third party reports related to the ownership transfer, if necessary 12.

Some people will buy a property subject to the existing financing which will transfer title into there name and leave the loan in the previous title holders name, but the new owner will continue to make payments for the old owner who's name is still on the financing/loan.

You wire transfer that amount, the the  bank will then execute and record a Release in the county records.  

If you attempt to transfer to an LLC, you risk having to pay back the loan if the bank finds the deed was transferred.

We actually transferred funds to our checking, and wrote checks out of that.

Transfer some paper assets into real estate holdings and/or create cash flow. 

In general contributions into an entity do not trigger a taxable event.Doing it prior to sale leaves you open to issues of intent and holding period and the thought that you're somehow hiding gain somewhere in the entity transfer.