[Vocabulary] on/in market

[Birne]

hi,
if we want to say that something is available to buy we can say:
1. Wow, the new palmtop is on the market

But I am a bit confused which preposition shall I use when I want to say sth about 'job market':
2. I am studying English to increase my chances in/on the job market.
3. What specialist are sought-after in/on the job market?

Which shall I choose when I mean job market not selling market?
Thanks

 

[Tdol]

1 This doesn't sound natural to me- I would use on sale/available.
2 I think you can use both.