I will give you step by step forgery committed by them and things to check if you still want to buy.
Never go on verbal commitments ask them for mail from office represntative.
never sign the application blank -Most important the payment plan page ask them to fill it or cross the same before signing.
They will charge 24% from the date you paid your first payment so keep it in mind the time horizan of your payment.
You have to pay advance maintainence for 3 years approx so keep the cash ready.
Finally once you have paid the booking amount you are now at their mercy so keep your paperwork strong