Ricky reacts very surprised to the fact a Jacques Marcel dress cost $500 but he should be used to that price because that was the cost of the Don Loper dress in Hollywood. Also Ricky says he bought her a Don Loper dress but he did not - Lucy got the dress for free because he needed her to wear another dress in the fashion show.
The handbag that Ethel Mertz purchases in Paris is the same prop handbag that Lucy Ricardo bought in New York in "The Passports" - Season 5, Episode 11.