I prefer not to split up the set of front cats and oxygen sensors. They are still available for 200.00 plus shipping, which seems a fair deal. I prefer not to use ebay, but may post them out there.
It does seem like there is a larger audience of Boxster owners out on ebay, even though I prefer to use the forum to sell parts. I had a full set of headlights, taillights, and the narrow light on top of the rear hood that only saw 5 years of use. I had them listed on the forum for 175.00 and they were not selling, I put them on ebay and they sold for 375.00 this week.
Ed