UBCD contains programs that are freely available but many of these programs do
not have open GPL licence. e.g. DIMM_ID, several Intel CPU programs, Astra, hard disk test programs from disk vendors, Mcafee AV, etc.
It is a common misconception that Freeware can be used by anyone and re-sold by anyone. This incorrect. They cannot be used by a commercial company or sold for profit.
By including these programs in UBCD and by clearly stating that the s/w on UBCD is free to download for
private use only and not for re-sale it will prevent people from making a profit on eBay.
Anyone who sells UBCD for profit and does not have the permission of ALL the authors is leaving themselves open to prosecution.
Equally, unless the programs are GPL or suitable openly licensed, or unless you have written permission from the authors, you do not have the right to include them on your website for download.
As the author of DIMM_ID and on behalf of Research Machines, I give you the right to include DIMM_ID v3.1 2001 version on your website

but NOT the right to sell it for profit or to use it for business/commercial use. Thus selling it on eBay is illegal

. I would also hope that you have similar statements from other companies (e.g. Intel) whose programs you are making available for download (if required).