How much am I worth?

I know this question is extremely subjective, I just really don’t have anyone I can go to for this kind of advice. I’ve been working a Magento 2 job for about a year now, and worked with M1 for 3 years prior. I don’t have any of the certifications though. I keep going back and forth if it’s worth it to get them.

I mainly do backend work, but I can figure out the Knockout JS stuff given the time. Haven’t really needed to dive too deep into frontend since we have separate devs for that area. Without seeing my work I know it’s pretty hard to say, but what salary range should I be looking for with these qualifications? As I said I do currently have a job, I’m really just curious what kind of salary I should be making realistically.

Thanks in advance for any advice!