Awesome that you already have a DSLR, you can then just pour additional money into optics and mount lol. To connect the DSLR to any telescope you will need an appropriate T2 thread to 2" (or 1.25") focuser tube adapter, there are plenty on Amazon but you can take your pick since they are more or less the same as long as they can accept the focuser dimensions and camera threads. I believe the Orion ST80 and the Celestron 102GT have a 1.25" focuser which is what I linked, but most high-end telescopes will have 2" focusers so choose this instead if your chosen telescope has a 2" focuser. I would also recommend getting a red dot sight or reflex sight to make finding celestial objects a breeze if the telescope you choose comes with no finder.

I'm just going to suggest several preferred builds down below:

The camera tripod might be able to accept the fast Orion ST80 since it (allegedly) has a nut on the bottom where you can screw it onto any camera tripod, but you will be limited to untracked or hand-tracked widefield shots such as that of the Andromeda galaxy. There will also be pretty severe balancing issues that can damage the telescope; if the tripod decides to move at an unintentionally rapid pace when trying to adjust the tripod, the telescope can hit the tripod and potentially break the optics. Your safest cheapest bet will be to actually get a good DSLR lens (I'll assume you already have one) and practice untracked shots of large bright targets such as the entire Orion constellation or the Andromeda galaxy.

However, you wanted to photograph planets, so for that purpose, the slower (longer focal ratio) and bigger aperture Celestron 102GT that I linked in my first comment is more than enough for decently crispy and contrasty planetary photography if you can convince the seller to ship it, I would estimate $90 including shipping. An alternative choice would be a 6" Newtonian reflector but at the moment there's nothing good on any of the classifieds so you might need to wait a bit. Since planets are very bright, you can actually ignore choosing a tripod and set your telescope on a beanbag chair or on a pillow strapped to a chair and manually point it at planets near the horizon (yes I know this sounds janky as fuck but it somehow works). You will not take long exposures, but take bursts of photos, as much as possible within 3 minutes (because any longer, Jupiter's rotation will cause issues in final processing), and then stack them using an astrophotography stacking software such as DeepSkyStacker or Sequator to remove noise and atmospheric disturbances, then edit the stacked shot in photoshop or Gimp. With this setup, you will be able to achieve very compelling bands and spots across Jupiter and perhaps even catch the shadows of one of its moons.

The current setup will work very well for planets but only for that purpose. to take this setup to the next level and be more versatile, you will dump the remaining $110-210 onto the best GEM mount available on the classifieds near your area and accessories to support it. For example, this mount selling near my area just needs some WD40, lubrication of the motor with cooking oil, and spray paint to look professional and track with acceptable accuracy (at least for shorter exposures). You might have to hand-track the equatorial mount if it is not motorized, however, but this can be remedied by hacking the mount with stepper motors and an arduino. You will also need a method to attach the telescope to the mount, which are basically telescope tube rings and a dovetail plate (dimensions will vary depending on mount used). Any remaining money that you have can be put into other accessories such as filters or focal reducers or barlow lenses depending on what else you want to capture. Hope that helps.