How Much Should I Charge for a TikTok Brand Collaboration?

Hey everyone, I’m new to brand collaborations and wanted to ask for some advice or insight from other creators who've been through this. I'm a TikTok creator with 74K followers, and I'm starting to receive brand emails for paid collabs, mainly app promotions and music promos.

My engagement rate is pretty strong, and I've gathered around 4.4 million total likes across a relatively small number of videos. Most of my videos does well, and I only post when I feel like it.

So far, here are some things I’m trying to figure out:

• What’s a fair rate to charge for a single TikTok video? I don’t want to undercharge, but I’m also worried about scaring brands away if I price too high.
• A brand asked me for 2–4 videos per month, but I felt that was too much and countered with just one or two videos max, and they agreed. I charged $190 USD for 2 TikToks + a story. Does that seem reasonable?
• Is it normal to ask brands what their budget range is before naming your rate? Or does that risk getting lowballed?

Would really appreciate any advice from more experienced creators here, TIA!