Motorhome sales fell 6 percent in July, but used RV prices are on the rise, according to analyst firm Robert W. Baird, citing Statistical Surveys.

Baird attributed the drop to high gas prices, unfavorable weather and weakening consumer confidence.

The seasonally adjusted annual rate of U.S. motorhome retail registrations continued to fall in July – down to 17,400 units, from 18,200 units in June, according to Baird. U.S. dealers sold 19,500 motorhomes in 2010.

Baird said dealers lowered inventory in July, which is a trend it expects to continue through 2011.

Used RV prices are rising, according to Baird, citing The Black Book. Used motorhomes are up 4 percent to $42,146, on average, while used towables are up 2 percent to $10,455.