Mobile notary as Justin described has worked for me as well. Screen the notary for responsiveness and good communication to the extent possible. As soon as they fail in either category, drop them immediately and move on to the next.
Sometimes offering to wire funds instead of a check makes a Seller feel more confident about payment...no idea why, but occasionally it's helped.
Another method to keep in mind is an online escrow service, such as this one: https://www.safefunds.com/Sf2H... and this one: https://www.escrow.com/
I have not used this method yet, so cannot vouch for either service.
here's how safefunds.com describes their service:
First, Buyer and Seller both enroll for NO CHARGE, NO OBLIGATION Safefunds memberships.
1. Either buyer or seller enters the transaction into the Safefunds system. It is addressed to the other party.
2. Buyer and seller negotiate until both agree to the terms and conditions.
3. Buyer deposits the necessary funds into his Safefunds Account and commits the amount necessary for the transaction. Deposits are made by bank wire, electronic funds transfer, or check (checks must be drawn on a U.S. bank).
4. Seller sees the funds reserved for him. Seller knows the payment is secure. Seller sends the item or provides the service described in the transaction.
5. Buyer receives the item or service. Buyer releases the control of the funds to the seller.
6. Seller withdraws his funds from his Safefunds Account either by electronic funds transfer (inside the USA), international wire transfer (outside the USA), or by check.
BOTH buyer and seller have been fully protected. Buyer did not release the funds until he received the item. Seller knew the funds were secure, before sending the item; there could be no payment fraud or chargeback.
If a disagreement arises, the Safefunds system includes complete dispute resolution service.
and fees:
Seller’s Fees
The transaction fee is:
$38 for transactions less than $2,000.
$58 for transactions from $2,000 to $3,999.
$78 for transactions from $4,000 to $6,999.
$98 for transactions from $7,000 to $9,999.
$128 for transactions from $10,000 to $14,999.
$158 for transactions from $15,000 to $19,999.
$188 for transactions from $20,000 to $27,999.
$228 for transactions from $28,000 to $34,999.
$298 for transactions from $35,000 to $48,999.
$438 for transactions from $49,000 to $99,999.
$648 for transactions from $100,000 to $169,999.
$888 for transactions from $170,000 to $239,999.
$1188 for transactions from $240,000 to $299,999.
Additional amounts, $400 per $100K plateau.
The fee is deducted from the amount the seller receives.