Find out if you are required to pay sales tax ( as we are in Fla.). If
you don't pay up front,the state will find out from the FAA and send
you a notice to pay + interest+penalty from the date of purchase. Pay
attention what fees/taxes you pay with the DMV so you don't pay taxes
twice.
What? You paid 4000$ for the spare tire and 4000$ for the
trailer...good deal!
What? You paid 6000$ for the instruments (used) and 20000$ for the
glider...good deal!
What? The glider needs a new finish and you only paid 14000$ for
it....all the better.

The glider is one item, the trailer is another. Treat them separately.

Mr. Haney would be proud.

R