Dear Juan,

Thank you for your request. The presented object is a drawing in pencil on paper with unknown measurements. It depicts an abstract composition. This piece was made by an artist who is not listed in auction record lists or is represented by galleries. Sadly this artwork has more decorative value than a price in the open art market.
This piece is in good condition and there are no serious damages visible.
An estimation would be between 2 to 4 USD.
This estimation is based on actual recent past recorded auction sales of comparables. Retail "asking prices" can be higher and vary.

With kind regards,
Georg