Hi Bruno,
I don't know what style of music you play.
I range from clean, to mild drive, to rock, to heavy and everything in between. So depending what I'm playing, I'll use a pedal (or pedals) that suit(s).
I like the MI Audio Tubezone (did you check youtube?) and sometimes cascaded with the MI Audio Crunch Box. The Zoom Hyper Lead is good. I also use the Zoom Tri-Metal (very high gain and amazing low end) and Zoom Power Driver (yes, I have all three Zoom pedals). You can only buy these Zoom's 2nd hand.
I have the OCD and BB+ preamp pedals but I tend to cascade these with other pedals.
I have an Ibanez Fat Cat which I think is good, too (cannot buy new) but I EQ after it.
Other pedals that I have but can't remember what they sound like with the recto: Rat (vintage), Fulltone Fulldrive, Wampler Pinnacle (not too good with recto but great with JSX), Marshall Guvn'r (original, not bad at all, sound good with the recto), Ross overdrive (original), Maxon SD9 (not bad, more gain/gritty than TS9), HBE Power Screamer (heaps of gain, good build - may suit you?) and a few others that I can't think of right now.
I'm reluctant to say 'buy this pedal' because your taste will be different to mine. I tend to favour pedals that have more than just a 'tone' control, even though most of the ones I have do. This is why I usually put an EQ pedal after these pedals. With the MI Audio, I don't use an EQ pedal as it has plenty of tone dials.
I also understand your situation with trying different pedals as they may not be available to you. Also the risk you have in buying one and not being able to return it if you're not happy. It's a difficult position to be in.
Maybe to start-
1. buy a TS9 / TS808 type pedal. Most on this board use them. A cheaper TS is the Ibanez TS7. It's supposed to be the same as a TS9. I have one and I think it's good (I don't get too carried away with the "original chip, sounds better than the best blah blah blah..." advertising.
2. buy an EQ pedal (I recommend this). The TS pedals have a tone control only. If you can't get the tone you want, the EQ pedal will help. Traditinally, TS type pedals drop the bass volume so you may want to add some in after the pedal.
Can you go to local gigs and see what other people are using? Talk to these guys and ask if they'd be willing to come by your place with their pedals (serve a cafe latte.....lol). This may be a good starting point for you. It may be an alternative before buying anything.
Check youtube for the pedals I've mentioned. If I had a lot of time, I'd record a few pedals for you. Look, if I can this weekend, I'll do it, but I'm not promising you. It's very busy this time of the year.
OK.... enough from me (for now....)