The price of the Haunting Ground promo should be between $20-$40 USD. The US version is harder to find than the Japanese or PAL version, the PAL version had multiple regional variants (back of the case and manual including additional languages) and both the Japanese and PAL UK versions had a re-release in contrast to the US ones. The promotional version is essentially the UK version of the game, no additional languages are included in the sleeve. Meaning that there aren't any leftover files on this disc in contrast to some other promos like Drakengard 2. The Resident Evil 4 PAL promo is probably around a similar price range, these are more common than the Haunting Ground one all things considered so I would say a tad less. Can't help with price recommendations for the others I'm afraid.
Unless they are popular titles, usually meaning a series, promo games always sold for a little bit less than the retail games. Resident Evil should have some interest, maybe GTA too. Haunting Ground less so, but you do get Capcom collectors. Retail Haunting Ground is only £10-15, so I wouldn't expect it to be much more.