Thank you. I plan on registering for a travel system and we are going to use my baby crib.
As in the crib you slept in as a baby? If so, not a good idea - it would not meet current safety standards.
I researched it online and found that if you secure the rail it is fine. Plus the baby will stay in our room for at least the first 9 months.
You can buy an inexpensive, safe and modern crib for ~$100. As pp pointed out, safety standards have changed over the years and I would wonder if the hardware and construction is still solid on a crib several decades old. Even with the fact that you will be co-sharing a space, it does not mean you will be able to supervise your baby 24/7.
I find that consignment shops in my area don't offer the best prices compared to craigslist or store clearance sales. I often get better clothing deals from places like Gap, Old Navy and Marshalls than buying used outfits from the second hand places.
I also had snagged some good deals through Amazon's warehouse deals on returned/opened merchandise or items where the outside packaging was damaged.