When to buy...when to sell

This partly depends on where one lives, if in the great frozen north then the best time to sell is in the spring when people are interested in using an RV, and not thinking about the cost of winter storage, driving on ice, etc. If in Florida or Southern California then this is much less of an issue, though it does seem highest prices are seen in the Spring, though likely not enough higher to justify the cost of ownership and depreciation hit of waiting for that time of year to come around again.