good guess chief, 42
now? maybe 1 if i'm lucky
when i was at peak i could run a half mile in under 2 minutes and my best 5 k was 16:19 all done in high school as i was a stud x-country and track man at about a buck 28 LOL
my VO2 max was tested at The Ohio State University at it came out to be 71 ml/kg/min which is ELITE status 
what's your best ever mile?
Shame you stopped then. Under 2 min 800 meters is like super elite.
At your age, you'd still be young enough to perform at a high level, rather than throw that and your health away for some temporary cosmetics. And, I'm not anti-TRT either, just think it's way too early for you. But, to each his own - we all do this shit for our own reasons, none right or wrong.
Since you asked, my best ever mile was probably 5:53, but that was in HS with no training, lol. For me now, I hate running, but do it as necessary means for overall conditioning, OCR/GR type stuff, and it's the ONLY thing that raised my good cholesterol significantly. I don't try to max out a mile, but if I look back to a workout I was proud of it went like this, since I stayed in the 6 min range on the last mile. I just finished 12 weeks of Wendler, and am currently working back to this kind of conditioning:
Run one mile in 6:35
1:15 plank
Spreed Ruck 2 miles under 23 min
1/4 mile walk: with 40 lb ruck, carry 80 lb sand bag....5 push up to start, walk 1/8 mile with bag...drop 10 pushup with ruck...10 walks up bleacher stairs with ruck........10 pushup with ruck, walk rest with sandbag
Ruck 1 mile in 11:20
Bear crawl with ruck 50 yds
Run 1 mile in 6:45
1:30 min plank