I'm interested if the ad is still available.
Is the job still available?
I'd be interested, if the job is still available.
I'd be interested, is the job still available?
Look no further, that is if the job is still available.
If still available, I'm interested. Ben
If still available, I'm interested.
If still available, I'd be interested.
If still available, I'd be interested. Ben
Separate names with a comma.