ORIGINAL: -pkh-
Depends on what you consider to be a "few" and how much he can sell the RDS8000 for.
He's invested in the Airtronics Radio. In time he'll have other less expensive receivers to go along with the RDS8000 8 channel TX. Until then he can swap, or buy 92824 receivers. Right now there is a 92824 for sale on Ebay for $66.00, selling in 5 hours another selling in a few days. In the recent past 92824 receivers have sold for $62, $80, $76 and $64.00.
To suggest to someone they sell what they have which is perfectly good and invest in something else make absolutly no sense to me!