Hi mate,
Dude, Ignor these ignorant fools!
You can get some great deals on BMXs now. Depending on your budget. We the people do some awesome full builds.
I’d also look at Felt.
If your 5ft tall you need quite a short top tube. Most full builds will come in 20inch or 20.5 inch top tube lengths.
Things to look for are – Cassette rear hub, 9 tooth rear sprockets with 25 up front is ‘whats in’ at the moment. ( called Micro drive). 3 piece cranks come as standard with most bikes over £150. Mid,spanish or euro bb. Avoid American bbs (bottom bracket)!!!! Expect it to weigh in around 27-28lbs. Unless you spend £500-600 and you will get a 22lb sweet ride!
You can get some wicked 2nd hand bargains on bmx forums and ebay. Just ask me if you spot antything you like the look of.
Have fun! Bmx is awesome! Just like ss xc dirt and trials!