I have a TX-3000 (from 1981) in my living room system.
It's a wonderful receiver, which has a very warm, powerful sound to it.
This is my first Onkyo.
I am convinced.
Vintage Onkyos are excellent.
The first thing significant purchase I ever made was a TX-3000 when I was 12 with my birthday/lawn mowing money. Spent all afternoon at the stereo store listening to various receivers with a great sales guy who didn't patronize me and was mindful of my budget. He actually steered me towards the Onkyo. Ended up with that, an Onkyo cassette deck that is long forgotten and some of their "house" 3-way speakers.
Great sounding and the industrial designer in me loves the look to this day. In fact I would say that receiver was an early inspiration and influence to my design sensibility. I am definitely in the market for a clean TX-3000 just to have again for nostalgia.
Currently I have a TX -4500 that I got at a garage sale for $10 about 5 years ago with a bunch of Bose Lifestyle speakers and Bose sub. I just all the Bose stuff on the curb without even bothering to hook it up...lol. I was happy with my current Pioneer/Klipsch audio and HT gear, but when I saw the 4500 it brought back a lot of great memories of my old TX-3000, long lost to time and many moves when I was single. It wasn't working from the left channel so I just sighed and put it on the Free section of Craigslist, and a guy emailed me and said I should hold on to it and get it fixed and said he thought there was a guy in Missouri City, TX that could probably fix it. At the time I was working in the next town over so I tracked down Charlies Airwaves and he got it running and apparently replaced a lot of caps and who knows what, he's not too talkative. Charlies Airwaves was/is ostensibly a CB radio repair place in kind of a dilapidated strip mall in a fading part of town. Their main business used to be CB radio repair and service, but as you might imagine that slowed down after the 70's and they opened it up to basically if it runs on electricity, they'll fix it, from toasters to TV's. If you are in the Houston area, check them out but I would recommend you deal with the son Roland, ol' Charlie is a nice guy but Roland is the one who does the work. Kinda gruff and not very talkative but knows his stuff. Anyways, that garage sale TX-4500 got me back into audio and with an eye on vintage audio. Bums me out I wasn't paying attention 10-15 years ago when all this was under the radar and could be had for a song.
I also have an A-5 integrated that I'm prepping for my sisters birthday next month, she saw pictures of my TX-4500 and just loved it, but I'm not parting with that
Thought I would put together a nice vintage system for her since she's been getting back into vinyl, so right now I have the A-5, a Nikko EQ-1, and JBL G300's that are probably the ugliest speakers I've seen and came without grills but I'm refinishing them and building new grills. There's no way I would part with the TX-4500, but I'm rapidly getting attached to the A-5 as well, beautiful looks and sound. Still, I'm really excited for my sis to get this setup, I think she'll be floored with the whole package. My Dad is a master woodworker and is making some beautiful stands to get the JBL's off the ground. I know they're not exactly "vintage" but they are a great sounding smallish speaker and vintage speakers always need something. Lot to be said for modern materials, manufacturing, and design when it comes to speakers.
Oldest daughter has an TX-8555 receiver for her phono setup, not vintage but a decent two channel receiver with wireless connectivity that I think I got for like $75.
Thanks for mentioning the TX-3000, brings back a lot of happy memories of a great receiver.