I totally understand the spammer worries.
Link to Benzworld Forum user page:
Benzworld.org - Mercedes-Benz Discussion Forum - View Profile: SpitzeStrom_Terp
Link to old website with images:
http://terpconnect.umd.edu/~miked/WWW/slk.html
Link to original post on Benzworld forum about roll bars:
For Sale: ... Put your R170 for sale suff here! - Page 6 - Benzworld.org - Mercedes-Benz Discussion Forum
I can't say that they are better outright just based on my own knowledge, but I can tell that the weld points on the bars I am selling look different than those in the eBay link you added. The bars I am selling look more like these listed on the UK eBay site that they are selling for 275.00 USD plus 125.00 USD for shipping:
MERCEDES BENZ SLK 1996-2004 R170 POLISHED STAINLESS SPORTS ROLL BAR SET, ROLLBAR | eBay
In the end, I'm just trying to make it worthwhile to sell them. I realize the original vendor I purchased them from would have upped the price in order to make money, but my only other option is to hold on to them until I sell the car down the road.