I often buy big bundles of hardware and software , take out what I want, and sell the rest on. It is a lot of work though - those ebay listing times add up, never mind the packaging and trips to the post office. Especially so when you sell 10 items, 9 pay straight away and the 10th person decides he's going to wait 3 days, so you have to make a special trip just for them.
I bought a Dreamcast bundle of ebay last year for £230, and people here said I'd overpaid, but I made £400 reselling that after i'd taken out the games I wanted.
In fact to give you an idea, last year I spent £666.25 on Dreamcast bundles and sold what I didn't want for £1213.61. That's a profit of £547.36 and a lovely collection of effectively 'free' games but it took about 3 months to clear and hours of taking photos and listing, post office trips and packing etc.
TLDR selling bundles is not cost effective but is certainly time effective. What do you value more?