So does that mean since jestar has been offline for 18 plus days I can put in for chomei? If so I would like to do so.
It's as good as yours.
Then, can new dibs be called again? By me? Right now?
That depends on the current situation of the beast.
Uchiha Madara challenged Ray for the 7-tailed beast back in May according to the respective challenge thread, and Ray said that he was "busy". Presumably he became unbusy as eventually he
the two fought both Madara and Athos over the 6-tails here
https://forum.shinobilegends.com/index.php/topic,9499.0.html (Madara)
https://forum.shinobilegends.com/index.php/topic,9495.0.html (Athos)
Chronologically, the Athos fight came first, and Athos' challenge is recorded in the 6-tails challenge thread. However, there is no record of Madara challenging Ray for the 6-tails in the challenge thread, and yet, there was a fight and, according to this post, an exchange of tailed beasts from the fight:
Ray chuckled and tossed the scroll containing the 6 tails towards the regenerating man. "Good answer~"He Began his own healing of his wounds which wouldn't take as long thanks to the Rebei's healing ability with the dark chakra. "Now what exactly do I get to learn?"
Uchiha Madara did not officially challenge Ray for the 6-tails, but he did officially challenge him for the 7-tails. Presumably, based off of this evidence, the held off challenge from the 7-tails thread instead became a fight for the 6-tails, meaning that Uchiha Madara's challenge for the 7-tails was fulfilled.
In that case, it depends on the activity of Ray. If Ray has gone inactive, then since it is outside of a currently active biju battle, then the Biju Council should be notified so that Ray can be stripped of the tailed beast.
Some of the active members of the Biju Council, earlier last year (man how time flies) in this thread stated that their default decision would be to give the beast to the latest challenger, which at this point would be Sabumaru, so yes, it can be claimed now by Sabumaru. This is assuming that Ray has not publicly posted a RP post somewhere in the SL world within the last 14 days and that any potential appeals to the Biju Council do not have the beast going anywhere else.
TLDR: If Ray's last public RP post was later than 14 days ago, then barring an appeal to the biju council for deliberation, then yes Sabumaru, you may claim the tailed beast as yours.