Adding the condition "goods belong to the seller until paid for" in a sale

Q: Please advise on below:

1. Many companies state at the bottom of their invoice "goods remain the property of the above company until fully paid for" What is the status of the goods?

2. Is it amaanat or does ownership pass on to the purchaser? Is such a condition permissible?

3. Will the sale be faasid if such a condition is added?

Punishment for cheating someone

Q: In the year 2014 one guy told me that I got a job abroad and the total cost of visa and air ticket and everything is rs.177 000 so he insisted to pay him and I paid him rs.177 000 and after the payment he ran away cheating me. Later on I came to know that I was cheated. I just want to know whether he will be punished on the day of judgement for cheating me and moreover by default he will be punished by Allah because he is a kafir. So kafir will be punished by Allah for not worshipping Allah. 

Employment involving the sale or handling of haraam items

Q: It seems that most jobs I’m qualified for are somehow indirectly related to the sale of haram items. I’ve seen Muslims working at these places, so I was wondering if I’m just overthinking about these things. The job I was thinking of getting is a stocking job where I may have to put haram products on the shelves of the stores. Is it haram for me to work at such a job?