OK, first off, I'm not a keyboardist -- I'm a guitarist. But I do use keyboards for composition work and light plinking around. So here's the situation. I have rather limited space to cram three keyboards into. The one that's gonna be on the bottom is an 88-key digital piano that comes with its own stand. The other two are synths -- a 61 key and a 76 key. I want to mount these two above the piano. Problem is, the piano is up against a wall, and that's pretty much where it's gonna have to stay. So I'm looking for a stand I can set behind the piano, that can stay flat against the wall, and that will have two tiers for the synths. Most of the stands I'm seeing that might work are sort of Z-shaped that will require I pull the piano well away from the wall. I'd prefer to find one that is simply straight, albeit with feet long enough to keep things stable.
 
I've been browsing through the stands that B&H offers and have found only one so far that seems to offer what I need. Unfortunately, it's also the most expensive model I've come across so far. So I'm still looking, hoping to find something cheaper. This is the one I found:
 
https://www.bhphotovideo.com/c/product/1389694-REG/stay_stay206_1200_02_tower_double_tier_keyboard.html
 
My only other option appears to be to go with a three-tier stand, unbolt the piano from its stand, and locate it on the bottom tier of a three-tiered stand. I'd prefer not to go with that arrangement, but I will consider it.
 
So, any advice?  Perhaps you might know of a stand that's cheaper than $300 that will do what I need?  You know, I'm a pretty handy guy. For a lot less than $300, I can build a stand that will probably work better than most. But if I can find something pre-made, I'd rather go that way.
 
So, thanks for any advice you'd care to offer.
 

First piece of advice: don't go cheap on a keyboard stand!

Even if you spend $400 on a stand, that's a lot less money than you'll have sitting atop it.

Some people have adapted drum hardware for keyboards. Very sturdy, but also very expensive.
 

Hoho :) Cool videos. I really admire the calmness of some of the players as disaster strikes :)
I guess these videos validates the old saying how you can save yourself into poverty.

Shelves?  Since it's permanent, and up against a wall...

I've been hunting for a better keyboard stand for months now. Checking them out in music stores, watching videos, seeing what other players are using onstage.
 
Final analysis: the simple and inexpensive X-style stands I use now are the best solution for playing out. They offer the best combination of stability, compactness for travel, room for pedals, and quick setup/teardown.
 
I'd take a different approach for a permanent installation such as in a studio, where setup time and portability aren't important. In that scenario, I'd probably use a Gibraltar stand for maximum sturdiness and leg/foot room. I would not use multi-tiered stands in the studio unless floor space was at a premium, because they visually obscure controls on the lower keyboards.
 
There are two main drawbacks to X-stands: they don't fold up compactly, and they may be inappropriate for very tall players who play standing. I am average height, and my stand is adjusted to its second-tallest position, and that's as high as I'd dare put it.  The problem is that the higher they go the smaller the spacing between the arms. That makes the keyboard rock more (not in a good way) and decreases the available area below for pedals.
 

Check out the Ultimate Support V-Stand Pro. It looks like it would fit behind a free standing keyboard and a second tier can be added.

These are what I use. Just make sure you tighten the nut well. Tight nuts make for ultimate support.