
Breville
Bambino Plus
Fast heat-up, easy for beginners; inconsistent shots, annoying cleaning.

Running these analyses costs money. Buy through my links to help keep lights on! I may get a small commission.
I like my pico presso and Flair Go pretty much equally. I have more control with the Flair, and more feedback as it is has a pressure gauge, however it's bigger and the end result in the cup is the same as the pico. The pico is very small, I always marvel how they've made everything pack together so well, and if you really want, you can buy a pressure gauge. I thought I'd sell one but I like them both enough to just keep.
One no frills and no electricity espresso maker, Flair Espresso, is also a great option. Keep a lookout for them on FB marketplace. Also keep a lookout for used burr coffee grinders, not bladed coffee grinders. Lastly, skip the mokapot. As much as I tried, I could never get an enjoyable coffee with it. It was okay, ended up donating it.
Flair will get you excellent espresso for that price, but you gotta put in a lot of work. That’s of course assuming OP already has a $400+ grinder which will be a requirement for any decent machine.
fellow robot owner: wouldn’t say machines obsolete. But I do think that or the flair are the best bang for your buck. The same price semi automatic is going to be much worse.
Get a flair espresso maker for about $150 , or find a secondhand one for less. Use costco beans. Buy a decent grinder either manual 1zpresso for the least expensive path, otherwise get a DF54 or look for secondhand again for cheapest option. All in, this would be less than $500 and possibly as low as $300. Espresso shots cost less than a dollar with this path. I assume you have a water kettle and scale.
Just going to chime in and agree with everyone recommending a Flair. Got one for Christmas as a “dip my toe and see” about brewing espresso at home and the results have been shockingly excellent. Workflow is not ideal, but if you’re comfortable with an Aeropress this is similar.

Breville
Bambino Plus
Fast heat-up, easy for beginners; inconsistent shots, annoying cleaning.

Cafelat
Robot Series
Manual, durable, exceptional espresso; no milk, effort for multiple shots.

Gaggia
Classic Pro E24
Mod-friendly workhorse, great espresso with mods; weak steam, poor temp.

Lelit
Bianca
Precise flow control, dual boiler; long heat-up, average build quality.

DeLonghi
Stilosa Series
Budget-friendly, moddable; flimsy build, needs upgrades for good espresso.

Ranked #1
Breville - Bambino Plus

Ranked #1
ECM - Synchronika II

Ranked #1
Lelit - Bianca

Ranked #1
Gaggia - Classic Pro E24

Ranked #1
Breville - Bambino Plus

Ranked #1
Breville - Bambino Plus