The first card is the reversed Five of Wands, representing a situation in which Marco aspires to comfort and success, but is thwarted by opposition. This means that Marco may be interested in a new computer to get more comfort, but he may also be blocked by something that prevents him from achieving his goals.
The second card is the Page of Cups, which represents a feeling of gratitude and well-being due to a gift received. This means that Marco may feel grateful to his friend for having advised him to buy a new computer, but he may also be blocked by the fear of not being able to financially support the purchase.
The final card is the Nine of Pentacles, which represents applying sound financial strategies to manage one's finances. This means that Marco can deal with the situation by applying an adequate and efficient financial plan to be able to buy the computer without jeopardizing his finances.
From the three cards, it is clear that Marco is interested in buying a new computer, but is hampered by the fear of not being able to afford the purchase. However, if he can put in place a suitable and efficient financial plan to manage his finances, he will have the ability to overcome this obstacle and achieve his goal. Therefore, the answer to the question is: Yes, I think it's a good idea to buy a new computer.