Not saying that this isnt great advice, but we're going for the wrong items here. ^^;
Personally I feel that that ship has sailed for the Sainte Ciels. If they were still in the Cash Shop and a good 300k less as they once were, then by all means it would have been a great time to pick them up. I picked up a couple and made decent profit on them each when they finally left. I wouldnt advise doing this now since the price of a sainte ciel is much higher than getting either one of the EI's. You're much better off just buying the EI itself, since they sell on a regular basis and save gold in the process.
Still, I feel it is too late to start hoarding those EI's anyway, but if you are willing to put in the extra gold for them and have patience, its your call.
I honestly dont understand why you are picking copper twopence, but can only assume you are taking a shot in the dark which is poor decision making when it comes to hoarding. Unless you have plenty of funds to spare, alot of older items are well past their prime and are not worth hoarding, since they could sell poorly on a regular basis, are unpopular with the userbase or their price just never goes anywhere. The MCs you mentioned are simply not hoarding material. Both have been around for quite awhile, but they arent even close to seeing 100k. Hell, Gift of the Gods has been around since 2007, and its price is just going for 50k. That right there tells you that this item just wasnt popular enough with the community. Remember, "good" is subjective. The item itself has to be well received as a whole if its going to considered for hoarding.
I recommend that you pay close enough attention to our
current EIs and MCs, as well as staying on top of the current rig and picking up an advance bundle as well. I also suggest getting ready for Easter.