I did the same thing. My first computer was a Model III that my uncle gave me in '82. Fortunately I never got rid of it as it's far more fun today than it ever was.
When I was 16 I got my first real job and bought a new 1000EX. I was finally able to take advantage of all the local BBSs...80 column, color and endless amounts of downloads. Had all the extra too like both 5.25 and 3.5 external drives, Plus expansion card, serial card etc.
After a few years, I wanted a hard drive and RS never offered one for the EX. I found a company that sold one, but the price was beyond insane. I ended up selling the EX and bought a 1000SL and a 32MB hardcard. For some reason I never really cared much for the SL and regretted getting rid of the EX. Hard to explain other than the EX had some kind of charisma to it that all computers since then have lacked.
About a year ago I picked one up on eBay with the Plus board, full 640K and 300 baud internal modem. Also came in the original box with manuals and original disks. I don't think it was ever used for more than a few hours as it looked brand new, no dust inside and not a hint of yellowing.
First thing I did was order the Plus to ISA adapters. I installed an XTIDE and got the HD I always wanted back in the day, but instead of 32MB it's now 2,000MB

Next a 2 port serial card with 9 and 25 pin connectors.
Lastly is the wifi modem to hit the endless amounts of BBS systems out there today. I even use the exact same copy of Telix I did back in the 80s. It's recaptured the magic of 35 years ago and then some.
Also got a V20 and just a few weeks ago I scored a nice 3.5" external drive with cable on eBay for a killer price.
If you liked yours back in the day, you're going to really like what you can do with it today.