They could both be right.  There is a filter for offroad or high dust
environments which is a bit expensive and there is the normal everyday
filter which costs about 1/4 as much.

Here you can see the numbers and prices for both at one of the online
vendors:

http://www.vanagain.com/search_result.asp

Or .. standard air filter
http://www.busdepot.com/details.jsp?partnumber=025129620A

Mike

Mary Holbert wrote:
> I went to buy air filter today for my 1989 van ...advance quoted 7.99 and
> auto zone quoted 31.99...neither place had it in stock but could order
> it...Which price sounds right?
>