Declare interest:
If you wish to buy an item, you must declare interest in the thread. If there are multiple items on offer, you must specify which item(s) or how many you're interested in. In both cases, this should be clear and unambiguous. Please avoid vague statements like "PM sent" or "I might be interested in...", use direct wording such as , "I am interested in...". The clearer you are in your assertions the less likely there will be any ambiguity as to who is next in line. Remember, English isn't everyone's first language here.
If you need more information about the item, you can declare interest and state that it's "pending some further information". Where reasonable, the information requested should be posted in the thread.
If another member has already declared interest, then they are first in line. You may also declare interest to be "next in line".
When there are multiple items on offer in a thread, you must declare which item(s) or how many you are interested in.
Sending a PM before posting in the thread:
Sending a private message before declaring interest is considered "silent bidding". You will lose your place in line to someone who has declared interest in the thread.