Any suggestions for a Freevie aerial?

I live in Kapiti and just recently got a new Samsung B650 TV - it has a built in freeview decoder but i dont have an aerial yet.
ive had a quick look at the warehouse and they were looking $100 for a bog standard one which seems very pricey for what you get.

Anyone got any suggestions where i can find a cheap aerial online? and/or someone to install it on my roof in Raumati :)

Thanks in advance!