Only for I'd say max 3-4 ge updates.
I've jumped in and bought stuff as soon as I saw advertising then sold usually 3 updates later and made a fair amount. Was like 120% profit I think. As in 10m would get 12m. But I used like 500m and got back 600m.
its only ever safe merchanting with a buyout clan if you have good junk trading skills if not i would just hold onto the item for a week or two then sell for max to make sure you dont lose anything.
If it were me i would be a bit scepticle to start with, and watch them for a bit see if they drop early and if they do, by how much early etc, then take that into account when doing the merch.
It's safe if you pay close attention to the item in G.E and check up on it every few hours making sure it's still well bought out. Once it starts weakening that's the time to sell! On the other hand you can hold onto the item and just junk trade. I've been ranked general in Smokin Mils, Wefightge, and Goldmerch.
Dont merch with randoms.
95% of them are scams, and drump way earlier then they tell you too. If you want to keep your money, make your own clan with GOOD CLOSE FRIENDS that you can trust wont dump early.
well m8 if i was you id go for it, if you invested 50m into gp family's merch and left it for 1 day for the ge to update you would of made alot as it went up 3.35k in one day and obviously you can keep it for 2 or 3 days longer then its porbably better to sell...
Merch the item for a day or two, NEVER fully support a clan merch or you will lose money, only high ranks and the leader know the real dump price, In 2lum's clan only us Generals get the true dump dates and item notification even our ranks do not find out until up to a week after us and then it goes public about a day or two later.