First, do you have firearms-specific coverage on your policy, or are there any exemptions they may fall into? My homeowners insurance is quite up front about excluding valuable collections like art, firearms, etc.
I used to carry a separate firearms insurance policy through Lockton, then later I decided to put the same money toward proactive protection against fire and theft.
Second, if your firearms are covered, is it full replacement cost coverage? In that case, bump up the values to include the LGS percentage and applicable taxes -- you'll want to cite the current "out the door" prices.
When I decided to end my CZ-52 phase, I netted around $500 apiece for mine, and that was during the pre-pandemic Trump era before prices went loopy. The 9x19 barrels are a plus provided they are extras -- a collector will want the original 7.62x25 Tok barrels. I'm seeing prices for TT-33s and their clones starting somewhere around $400.
Firearms for the Finest Collectors
simpsonltd.com
For insurance, I'd suggest putting down $800 for the CZ and $625 for the Chinese as their full replacement value, including spare mags, holsters, etc.