I think all that @Gwathdring is certainly true.
But, to add to it, I’ll say I have seen bundles of games sold on ebay on occassion…maybe 4-5 titles. I don’t recall seeing anything where every single title was a hit, usually a few good ones, a few unknowns.
Also, Massdrop occassionally does a bundle–but it’s usually a hunk of stuff for rhe same system (like Dominion and expansions, for instance).
Finally, you can sometimes DIY your own bundle in multi-game auctions (as on BGG)–but that’s restricted by all the issues of auctions (you’ve gotta actually win the auctions to get the games…). At least you can save on shipping…usually.