help please

[spandy 0]

I've been collecting a while mostly late 1800 early 1900 coins, Ive just picked up a couple for the princely sum of £1.50 and am wondering about value and if it is worth getting them graded.. if so where to start. here's the pics.

https://flic.kr/s/aHsm3hrmLG

 any help gratefully recieved

I was unsure whether to post the Aussie Florin in this Forum, does it count as half British lol. its in great nick I think. The third coin is toasted but if anyone has any ideas what it is they would be helpful. Thanks, Jon.

Edited August 23, 2017 by spandy
update

[Michael-Roo 777]

If genuine the 1921 Australian florin is quite valuable. The George III is a contemporary counterfeit. The George IV has a silver bullion value only.

[spandy 0]

I thought the George III looked a bit brassy, thanks

 

[Stuntman 264]

The George IV looks like a shilling or sixpence (depending on size) from 1825-29.