Having received a number of questions about cheap Ceiling Tiles and "what’s the difference"? the only advise I can give is be careful.
Well we all like a bargain and sure there are some cases where suppliers want to get rid of old stock, but a reason for them going cheap is the manufacture is no longer making the same type. This may not affect you now but later on when you need to replace a few....
There is also stock taken in from China and South America which is cheap, but the problem with this is apart from not knowing what is in them is they are generally made a different density from the European standard. This means that they are not suitable for the climate here and can get affected by moisture. We have seen some horrible images of sagging Ceiling tiles after a very short time.
I guess you get what you pay for very much applies here.