I have an HD-A1 (like new in the box) maybe used 6 months... Then I also had at the time (and stil do) the Add on drive for the 360. But toward the end of the format war I got the HD-A2 for $99 on black friday (which at the time was a steal) and then also at the very very end picked up an HD-A30 (my only true 1080p/24 output HDDVD player)
I have a collection of about 170 HD-DVD's most of them picked up for either free (all the buy a player get 5 free movie deals) or $2-5ea on blow outs at the end. In the beginning I only bought HD-DVD's unavailable on Blu-ray or in the rare cases that the HD-DVD had lossless audio (some warner titles) and the BD didn't.
In the end, i'm happy with my choice, i have a great library of classics... But i think I made a better choice in going MORE with Blu-ray. I shave about 550 Blu-ray movies and not one of them has given an issue. On the other hand i've had to replace about a dozen of my HD-DVD's due to disc rot. Fortunately for me, Universal and Warner were kind enough to replace faulty movies with Blu-rays.... But the ones i couldn't get, I was at least able to replace for relatively little to no cost through Amazon/Ebay etc.
I recently just picked up Troy (theatrical edition) on HDDVD for $2 sealed. I actually prefer the theatrical cut for the opening scene, i think it's way more impactful in its presentation, and i like the cover art a lot better too.
Anyways, I think a part of me misses those early days of HD and the format war... and a small piece of me almost wishes they could've existed side by side, but i guess that's just wishful thinking.
I'm still enjoying my stuff to this day and wont part with it any time in the near or distant future.
HDDVD owner: 360 add-on, HD-A30, HD-A2, A1
Blu-ray disc supporter: ubp-x800, XB1s,ps3-60gb, Oppo BDP-93, ubd-k8500
Audio: Denon/Polk, Onkyo/Klipsch-Sony, Samsung SB