I want to buy the whole series on DVD (no Blu-Ray apparently), and I want to make sure I get the best version with no missing extras. There seem to be two series 1-6 sets, one labeled 'Outrageous Fortune Complete Collection' and the other 'Outrageous Fortune Serial Offenders'. The latter appears to have been discontinued.

http://www.mightyape.co.nz/product/DVD/Outrageous-Fortune-The-Complete-Collection-Series-1-6-24-Disc-Box-Set-New-Packaging/20989187/

http://www.mightyape.co.nz/product/DVD/Outrageous-Fortune-Serial-Offenders-The-Complete-Collection-Series-1-6-24-Disc-Box-Set-plus-Bonus-Disc/8573038/

Is there any reason why people are paying $80+ for the 'Serial Offenders' set second hand on Trademe when you can get the other 'Complete Collection' for the same price new? Is one better than the other? Why did they change the branding?