At Namejet ENOM names are listed for biding during end of expiring period
(this period is 40 days, domains are listed at about 30th or a little earlier)
Usually bidding can be made till 36th date, in order if there are multi bidders to have time
for the private auction.
Transfer to new owner should be made the latest the 40th day because after it (entering redemption period)
registrar has no control on domain (it is back to registry and can be pulled out with big fee)
I wrote all these in order to understand these:
1. Old owner has many days to renew the domain with regular fee, till 40th day, especially if he sees that
his domain has interest for bidders at NJ listing.
2. Old owner has also 30 days more to pull out the domain from redemption with bigger fee. (that's why domain is auction locked
at new account and cannot be transferred)
3. Old owner can be contacted by a potential buyer (or even the registrar) in order to renew and "sell" the domain
Hope it helps