daily mail 22/5

[donnamp2]

What seaside seller shouts, waving pound notes maybe
4,2,3,3,3,
I have _ _ _ _ /m_ /a_ _ /_u_ /o_e
I'm new to cryptic and struggling ! Any help gratefully received.

[Vicasso]

stop me and buy one

[ladyalex]

STOP ME AND BUY ONE fits the letters and the numbers, but cannot give you an explanation as yet.
Someone will, though.....

[ladyalex]

Got it !
It's an anagram of 'pound notes maybe'

[donnamp2]

Thanks Vicasso and ladyalex. You were both so speedy I feel really thick!!!!

[Vicasso]

Thanks Ladyalex, like you, I could see the answer but not the why