If you have an agreed value that is what they have to pay - no argument.
You said that the agreed value was $50,000 7 years ago and that is totally irrelevant to 2021/22.  So what is the value on your current policy at the time of the accident - that is what they will pay you.  If now market value then good luck, likewise if you have just been renewing without agree the value and the current agreed value in the current policy is $20,000 then that is what they will pay as both you and Shannons have agreed that is its value.
You cannot sign up to an agreed value of say $20,000 when you last renewed your policy and now expect them to pay $50,000 - however if the agreed value was $50,000 on your last renewal then that is what they need to pay.
However from your discussion in your last post it would appear you have it insured for market value in which case you really are in the hands of the insurance company - in my mind never insure for market value - always Agreed Value.
So tell us what the last policy said.
Garry
				
			 
			
		 
			
				
			
			
				REMLR 243
2007 Range Rover Sport TDV6
1977 FC 101 
1976 Jaguar XJ12C
1973 Haflinger AP700
1971 Jaguar V12 E-Type Series 3 Roadster
1957 Series 1 88"
1957 Series 1 88" Station Wagon
			
			
		 
	
Bookmarks