" a cheap pistol that never increases in value and never make an heirloom" is certainly true.
There are many reasons why someone may choose to buy a "cheap" foreign-made 1911.
One is, they may not want to invest a sizeable amount of money to try the 1911 format.
and / or they may not be able to afford a more expensive 1911 @ all
Not everyone wants a 1911 (or any other pistol) as a heirloom possession.
Some buy less expensive 1911's to work on them , themselves.
Purchasers may not want to practice their gun smithing skills on a more expensive pistol.
I bought my first RIA 1911 ( a GI model in 9mm) because I could buy an entire pistol for less than I would have spent on parts,
as I had considered converting a Colt 1911 in 45 acp to 9mm caliber..new slide, barrel,bushing, ejector, extractor, magazine,.
Not to mention the difficulty I would have had actually finding Colt parts to do the conversion I'd considered.
Same story with the other RIA 1911 I own..wanted to try an Officer -sized 1911, and found a like new / previously-owned RIA ,
for about 1/2 what a Colt would have cost.. I just wanted to try that size 1911, to see if what I had read so often about them, was true.
( It wasn't.) I found my small RIA 1911 45 to be both easy / comfortable to shoot, & more accurate than I would have expected.
It also functions fine, with factory ammo ,or a variety of my hand loads.
Sure there are other reasons buyers may choose to buy the less expensive, foreign-made, 1911's ,in addition to the reasons I mentioned.