A friend of mine has an Indian made blunderbuss, and it has given me enough reasons to not buy an Indian gun.
The main problem with it is not the barrel, lock, or hardware, but the stock. In fact, the barrel is probably the best part of the whole gun. The fitment was mediocre, and the lock took a bit of tweaking to spark reliably. Unfortunately, the wood they use is ill suited to a gun stock. It cracked while firing blank loads.
Sure, other stocks can crack as well, but after examining it, it was also poorly designed, having the barrel secured via screws into the stock rather than a bolt through the trigger plate, which would be a much stronger setup. Even if this had been done, the wood they use would be far inferior to what you can get from any of the builder suppliers typically referenced on this site. It could be restocked, but by the time you do that, you'd have as much invested in it as if you had just bought a better gun in the first place.
That being said, it was servicable for a couple of years before the stock cracked, which is repairable, and it is a functional gun. I just don't care for the quality of the materials used, and don't consider the price of them to be significantly cheaper than a better gun, which is ultimately the main reason anyone chooses to buy one of these.
Sometimes people want something immediately, or don't want to save up a little more. Understandable, especially in the American culture that most of us live in. Everyone has to determine what is of value to themselves. To me, a little wait and much better quality, even at a higher cost, is of much more value than immediate gratification.
This doesn't mean that I think buying a mass produced gun is a bad idea. Most of the guns I own are mass produced, from Thompson and Pedersoli, and they have their tradeoffs as well, but I just don't see the value in the Indian stuff anymore, since I've been able to examine first hand the quality of their product.
I really want a wheellock, and I'd consider a mass produced one, were the only such example not an Indian gun that has had iffy reviews. Similarly, production matchlocks are scarce. If you don't want to build one yourself, there are very few options to you. I found a Miroku Japanese matchlock on an auction site a couple of years ago, though I'm still working out the firing of it (I think I need a better matchcord). Still, not everyone can find the things I've found used. Though I haven't handled any of his guns, I've spoken with John Buck, and he seems to build a very good quality gun at a very reasonable price. That's probably the route I'd choose if I were looking for a matchlock/wheellock if I wanted a good value and couldn't build it myself.
Of course, that's purely my opinion, and worth no more than what you paid for it.