Might as well stamp "I'm new at this and have no idea what I'm doing" across my head!

@Mary MitchellI used to rekey then realized it was a good investment to just get the keys that have the do not copy stamp on them.The time and gas I spent rekeying adds up.

for example county fees or stamps, etc. ?  

Depending on the equity situation, this might backfire on you, depending on how the 1st mortgage lender responds.2) You may already know this, but in FL the borrower will have to pay doc stamps on the mortgage you record, which I believe is separate from the recording fees. 

Expect to get less than 1 response for every 1,000 letters that will cost you about $600 with stamps, envelopes and paper.

Then why when a property is sold, the property appraiser is using the full sale value on the new appraisal and never deduct the fee paid for stamp tax, realtor commission, etc... ?

However, this also means that there are some high transaction fees (notaries, stamp tax, transaction fees, etc.) that go along with making a purchase, so you can expect about 9% added to the purchase price of any property.

That proof would be date/time stamped video or audio recordings. 

I've heard that it could trigger documentary stamp taxes because the transfer is considered a sale for tax purposes.

@Curt ThomasWe do a date stamped pictures of every surface of the house at move in, so we have proof of the condition of the property.